I've been using Mozy for quite some time, but recently it's been really wonky. I've been on a trial with Sugarsync, and the program seems a lot better. However, one really convenient thing about Mozy, is that it had the data sets integrated in the program, so I would just check a box and it would create a data set that backed up everything for Address Book, iCal or whatnot. I *think* I discovered where these files are located, so I can back them up with sugarsync. However, I figure that after my hard drive fails is the wrong time to be learning that I wasn't backing up the appropriate files. I was able to find instructions for this thing on Tiger, but it appears that things have changed a bit for Leopard. I found Address Book data at [user]/library/application support/address book iCal data at [user]/calendars Mail at [user]/Mail My hope is that in the case of a hard drive crash, I can just restore the files in these folders to the same location in the new hard drive and I'll be up and running again. Can anyone verify whether my assumption is correct? Also while I'm at it, any other mission critical files that would be a good idea to add to Sugarsync?